CFSE (Coordination Compounds) MCQs for NET GATE - ChemContent

Crystal Field Stabilization Energy 
CFSE MCQs for CSIR NET & GATE

Coordination Compounds

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Q1. The crystal field stabilization energy (CFSE) in units of Δo for [CoF₃(H₂O)₃] is-

[GATE 2003]

(a) 0
(b) 0.4
(c) 0.8
(d) 1.8

Q2. The Crystal field splitting energy Δ for CoCl₆^4- is 18000cm^-1. The Δ for CoCl₄^2- will be-
(a) 18000 cm^-1
(b) 16000 cm^-1
(c) 8000 cm^-1
(d) 2000 cm^-1

Q3. Which of the following species/molecules has a planer geometry?
(a) Ni(CO)₄
(b) SF₄
(c) CoCl₄^2-
(d) XeF₄

Q4. The CFSE will be highest for-
(a) [CoF₆]^3-
(b) [Co(CNS)₄]^2-
(c) [Mn(H₂O)₆]²⁺
(d) [Co(NH₃)₆]³⁺

Q5. The complex with maximum CFSE is

[GATE 2000]

(a) [CoCl₄]^2-
(b) [Co(H₂O)₆]³⁺
(c) [CoF₃(H₂O)₃]
(d) [CoF₆]³⁺

Q6. The number of manganese ions in tetrahedral and octahedral sites respectively in Mn₃O₄ are-

[GATE 2002]

(a) One Mn²⁺ and two Mn³⁺
(b) One Mn³⁺ and two Mn²⁺
(c) Two Mn³⁺ and one Mn²⁺
(d) Two Mn²⁺ and one Mn³⁺

Q7. The Magnetic moment of the complex K₃[CoF₆] is 5.0 µB. The total CFSE will be

[GATE 2008]

(a) -0.4 Δo
(b) -0.4 Δo + P
(c) -2.4 Δo + 3P
(d) -1.8 Δo + 3P

Q8. For the complex ion [Cu(NH₃)₆]²⁺, the coordination geometric will be

[GATE 2004]

(a) Octahedral
(b) Tetragonally distorted octahedral
(c) Trigonal Prismatic
(d) Trigonal antiprismatic

Q9. The series with correct order of increasing Δo in their complexes is-

[GATE 2006]

(a) I^- < PR₃ < CH₃^- < CO
(b) PR₃ < CH₃^- < I^- < CO
(c) CH₃^- < PR₃ < I^- < CO
(d) I^- < CH₃^- < PR₃< CO

Q10. Arrange the following metal complexes in order of increasing hydration energy

[GATE 2007]

(a) [Mn(H₂O)₆]²⁺
(b) [V(H₂O)₆]²⁺
(c) [Ni(H₂O)₆]²⁺
(d) [Ti(H₂O)₆]²⁺

Answer Key

Q1.b Q2.c Q3.d Q4.d Q5.b Q6.a Q7.a Q8.b Q9.d Q10.a

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